WO2020229141A1

WO2020229141A1 - Fastening device for fastening a connection arrangement to a printed circuit board

Info

Publication number: WO2020229141A1
Application number: PCT/EP2020/061487
Authority: WO
Inventors: Andreas Schrader
Original assignee: Phoenix Contact Gmbh & Co. Kg
Priority date: 2019-05-10
Filing date: 2020-04-24
Publication date: 2020-11-19
Also published as: CN217064149U; DE112020002331A5; DE102019112236A1

Abstract

The invention relates to a fastening arrangement (100) for fastening a connection arrangement (200) to a printed circuit board (300), having a U-shaped main part (110) which comprises a first fastening arm (111, 112) that can be fastened to the connection arrangement (200); a second fastening arm (111, 112) which is arranged parallel to the first fastening arm (111, 112) and can be fastened to the connection arrangement (200); and a connecting arm (113) which connects the first fastening arm (111, 112) to the second fastening arm (111, 112) and which can be fastened to the printed circuit board (300), wherein a first transition region (123, 124) between the connecting arm (113) and the first fastening arm (111, 112) and a second transition region (123, 124) between the connecting arm (113) and the second fastening arm (111, 112) are of bent configuration such that a first solder-receiving space (125, 126) is formed at the first transition region (123, 124), and a second solder-receiving space (125, 126) is formed at the second transition region (123, 124).

Description

Fastening device for fastening a connection arrangement to a

Circuit board

The invention relates to a fastening device for fastening a

Connection arrangement on a circuit board. The invention further relates to an arrangement with a printed circuit board, a connection arrangement and such

Fastening device.

Terminal arrangements can be attached to circuit boards by means of a solder joint. Fastening devices can be used that have a

Strain relief for the contact elements attached to the circuit board

Can provide connection arrangement. Both the contact elements and the fastening devices can each be fastened to the circuit board with a soldered connection. The soldering points between the contact elements and the printed circuit board can be relieved by the fastening devices and operating forces occurring when the connection arrangement is operated can be relieved of the

Fastening devices are included.

The invention is based on the object of providing a fastening device and an arrangement in which the functionality of the

Fastening device can be further improved.

The object is achieved according to the invention with the features of the independent claims. Appropriate configurations and advantageous developments of the invention are specified in the subclaims.

The fastening device according to the invention is characterized in that it has a U-shaped base body which has a first

Fastening arm which can be fastened to the connection arrangement, a second fastening arm which is arranged parallel to the first fastening arm and which can be fastened to the connection arrangement, and a connection arm which connects the first fastening arm to the second fastening arm and which can be fastened to the circuit board, wherein a first transition region between the connecting arm and the first fastening arm and a second transition region between the connecting arm and the second fastening arm are formed in a curved manner, so that a first solder receiving space is formed at the first transition region and a second solder receiving space is formed at the second transition region. According to the invention, the fastening device is now formed from a U-shaped base body which has two fastening arms, via which the fastening device can be fastened to the connection arrangement. Due to the U-shape and the two fastening arms, the base body and thus the fastening device can grip around or clasp an area of the connection arrangement on which the fastening device is arranged, so that a particularly secure fastening of the fastening device to the

Connection arrangement can be made. Due to the U-shaped configuration, the base body can be designed to be elastic, particularly in the area of its fastening arms and thus in the area of the fastening to the connection arrangement, so that the fastening of the fastening device to the connection arrangement can be facilitated. For example, when installing the fastening device on the connection arrangement, the fastening arms can spring open outward in order to prevent the base body or the fastening device from being pushed onto a region of the

To facilitate connection arrangement, in particular on a receiving rib of the connection arrangement. The fastening arms can be attached to the area of the

Connection arrangement are arranged that these with their inner surfaces, which each point in the direction of the other fastening arm, in the fastened state

can in particular lie flat against the area of the connection arrangement. The two fastening arms are connected to one another via a connecting arm. The connecting arm preferably extends at right angles to the first mounting arm and to the second mounting arm. The base body and thus the fastening device can be fastened to the circuit board by means of a soldered connection via the connecting arm. It is preferably fastened via an outer surface of the connecting arm which is directed away from an interior space of the base body. With this outer surface, the connecting arm or the

Sit the base body flat on the circuit board. The transition areas of the

The connecting arms to the two fastening arms are rounded so that they are provided with a radius. This rounding or curved design of the transition areas allows in between the respective

In the transition area and the gap formed in the circuit board, solder material flows in and is deposited, as a result of which solder fillets, which can each have a wedge-shaped cross section, can form particularly well in the transition areas. The solder fillets are formed in areas directed away from the interior of the base body Outer surfaces of the base body of the fastening device. By forming such solder receiving spaces at the transition areas of the fastening arms to the connecting arm, a particularly good and stable soldered connection can be formed between the fastening device and the circuit board. By means of the fastening device, a space-saving design of a fixation can be achieved with the largest possible soldering surface on the circuit board, whereby a high holding force and thus good strain relief through the

Fastening device can be made possible.

For fastening the base body to the connection arrangement, the first fastening arm and / or the second fastening arm can have a latching area. A locking connection between the base body or the fastening device and the connection arrangement can be formed by the locking region. The locking connection enables a detachable connection between the

Fastening device and the connection arrangement. A latching area is preferably formed both on the first fastening arm and on the second fastening arm in order to be able to achieve a particularly secure fastening of the fastening device to the connection arrangement.

The latching area can be designed, for example, in the form of a window-like recess, which is formed or on the respective fastening arm.

can be shaped. A latching contour formed on the connection arrangement can, for example, snap into this window-like recess, in that the latching contour can penetrate through the window-like recess.

The window-like recess can be T-shaped, for example. Other forms of the window-like recess are also possible.

In order to be able to facilitate fastening of the fastening device to the connection arrangement, a guide slope can be formed on a free end of the first fastening arm and / or on a free end of the second fastening arm. The guide slope can in each case be formed on an edge region of the free end of the fastening arms, so that the edge region can taper upwards, that is to say directed away from the interior of the base body. The base body and thus the fastening device can be facilitated on a region of the connection arrangement.

The base body can be formed from a tin-plated metal strip. The tin-plated metal strip can be formed into the finished shape by bending and punching. The metal strip can thus be tinned even before the actual shaping and formation of the base body. As a result of the tin-plating, the base body and thus the fastening device can have a particularly good resistance to corrosion.

The metal strip can be formed from a copper material, for example. The copper material can have good elasticity. In addition, the copper material has good solderability.

The object according to the invention is also achieved by means of an arrangement which has a circuit board, a connection arrangement fastened to the circuit board and at least one fastening device for fastening the connection arrangement to the circuit board, the fastening device as above

can be described, trained and further educated.

The connection arrangement can serve to make electrically conductive contact with one or more conductors and / or one or more plugs with a printed circuit board. The connection arrangement is arranged on the circuit board for this purpose. The

The connection arrangement preferably has one or more contact elements which can be connected to the circuit board in an electrically contacting manner. The

Contact elements can be connected to the circuit board in an electrically conductive manner, for example by so-called SMD soldering or a through-hole soldering connection. The fastening device enables the connection arrangement to be additionally fastened to the printed circuit board, the fastening device not being intended to provide electrical contact, but rather a strain relief for the

Can form connection arrangement. Two or more are preferred

Fastening devices are provided by means of which the connection arrangement can be fastened to the circuit board. The connection arrangement preferably has at least one receiving rib to which the at least one fastening device can be fastened. The

The receiving rib can be designed in the form of a web, a beam or a plate. In the fastened state, the fastening device can grip or clasp the receiving rib. The receiving rib can be formed or arranged at any desired position on the connection arrangement. For example, the receiving rib can be formed on an outside of the connection arrangement. The receiving rib can, however, also be arranged at a position along the entire length of the connection arrangement. A receiving rib is provided on the connection arrangement for each fastening device.

The at least one receiving rib can have at least one latching contour via which the at least one fastening device is attached to the at least one

Receiving rib can be attached in a latching manner. A detachable latching connection can be formed between the fastening device and the connection arrangement through the latching contour. The locking contour can with the locking area one of the

Fastening arms of the base body interact in a latching manner. The receiving rib preferably has one on each of two side surfaces directed away from one another

Receiving rib, wherein the two fastening arms of the base body of the fastening device can be fastened to the two side surfaces in the fastened state.

The at least one latching contour can preferably be in the form of an elevation which, in a latching state, can penetrate through a latching area of the first fastening arm or the second fastening arm of the base body of the fastening device in the form of a window-like recess. Because the fastening arms and thus the base body can be designed to be elastic, they can be deflected when guided over the elevation and then spring back and engage behind the elevation. Unintentional loosening can be reliably prevented by such an attachment of the fastening device to the connection device arrangement.

In order to make it easier to fasten the base body to the receiving rib, the elevation can have a bevel. Due to the run-up bevel, the respective fastening arm can be easily handled when fastening to the latching contour be pushed over the elevation, the run-up slope being able to specifically guide and control a deflection of the respective fastening arm.

The contour of the elevation is preferably adapted to the contour of the latching area or to the contour of the window-like recess of the latching area. For example, the elevation can be T-shaped.

The connection arrangement can be constructed in various ways. For example, the connection arrangement can be formed from a connection device. The

However, the connection arrangement can also have a plurality of connection devices which are arranged side by side. The connection devices can be designed, for example, in the form of connection terminals. Furthermore, the connection arrangement can also have one or more armature disks, which can be arranged adjacent to one or more connection devices. The armature disks preferably have no connection options for a conductor or a plug, but are only used to attach the

Connection arrangement on the circuit board. The connection devices can have connection systems for a conductor or a plug, for example, designed as spring-force connections or screw connections, the

Connection systems can be arranged in a housing of the respective connection device.

The at least one receiving rib can be on a housing

Connection device of the connection arrangement or be formed on an armature disk of the connection arrangement. The receiving rib is then preferably in one piece with the housing of the connection device or in one piece with the

Armature disk formed. The receiving rib can thus be part of the housing of a connection device or part of an armature disk.

The receiving rib is preferably formed from an insulating material, in particular a plastic material.

The invention is explained in more detail below with reference to the attached drawings using preferred embodiments. Show it

1a and 1b a schematic representation of a fastening device according to the invention,

2a and 2b a schematic representation of a receiving rib according to FIG

Invention,

Fig. 3 is a schematic representation of an arrangement with a

Connection arrangement, a circuit board and a fastening device according to the invention,

Fig. 4 is a schematic representation of a further arrangement with a

Fig. 5 is a schematic representation of a further arrangement with a

Connection arrangement, a circuit board and a fastening device according to the invention, and

6 shows a schematic representation of a further arrangement with a

Connection arrangement, a circuit board and a fastening device according to the invention.

1a and 1b show a fastening device 100 in two different ways

Views.

The fastening device 100 has a U-shaped base body 110. The base body 110 has two parallel to one another

Mounting arms 111, 112 on. The two fastening arms 111, 112 are connected via a connecting arm 113 which is perpendicular to the two fastening arms 111,

112 is arranged. The two fastening arms 111, 112 and the connecting arm

113 delimit an interior 114 of the base body 110, in which a

Receiving rib 210, as shown for example in Fig. 2a and 2b, can be introduced. A latching area 115, 116 is formed on each of the two fastening arms 111, 112, via which the fastening arms 111, 112 of the base body 110 can be fastened in a latching manner on a receiving rib 210. The latching areas 115, 116 of the two fastening arms 111, 112 are of identical shape here. However, they can also have different shapes from one another.

In the embodiment shown in FIGS. 1a and 1b, the latching areas 115, 116 are designed in the form of window-like recesses, each of which has a T-shape.

For fastening, the fastening device 100 is pushed onto the receiving rib 210 by sliding the fastening arms 111, 112 with their inner surfaces 117, 118 pointing in the direction of the interior space 114 along two side surfaces 211, 212 of the receiving rib 210 facing away from one another.

At their free ends 119, 120, the fastening arms 111, 112 each have a guide bevel 121, 122, which facilitate the sliding of the fastening arms 111, 112 onto the side surfaces 211, 212 of the receiving rib 210.

Opposite to the two free ends 119, 120 is a

Transition area 123, 124 of the respective fastening arm 111, 112 to the connecting arm 113 is formed. The transition areas 123, 124 des

Connecting arms 113 to the two fastening arms 111, 112 are rounded so that they are provided with a radius. This rounding or curved design of the transition areas 123, 124 is at each

Transition area 123, 124, a solder receiving space 125, 126 is formed, as shown in particular in FIG. 3, in which solder material can flow and deposit, whereby solder fillets, which can each have a wedge-shaped cross section, are particularly well formed at the transition areas 123, 124 can. The solder fillets are then formed between a surface of the printed circuit board 300 and the transition regions 123, 124 of the base body 110 of FIG

Fastening device 100 from. The connecting arm 113 has an outer surface 128 which is directed away from the interior 114 of the base body 110. In the attached state of the

Fastening device 100 on circuit board 300, outer surface 128 of connecting arm 113 rests flat on circuit board 300.

The base body 110 is formed here from a tin-plated metal strip which is bent and punched into the finished shape.

A fastening device 100 as shown in FIGS. 1a and 1b is fastened to a receiving rib 210, a connection arrangement. A receiving rib 210 is shown in two different views in FIGS. 2a and 2b.

The receiving rib 210 is web-shaped or bar-shaped or plate-shaped. The receiving rib 210 has two side surfaces 211, 212 which run parallel to one another. In a fastened state of the fastening device 100 on the receiving rib 210, the fastening arms 111, 112 with their inner surfaces 117, 118 lie flat on the side surfaces 211, 212 of the receiving rib 210. The

In the fastened state, connecting arm 113 rests against an underside 213 of receiving rib 210 with an inner surface 127 pointing in the direction of interior 114. The underside 213 is arranged at a right angle or perpendicular to the two side surfaces 211, 212.

The receiving rib 210 has a latching contour 214, 215 on each of its two side surfaces 211, 212, via which a fastening device 100 can be fastened to the receiving rib 210 in a latching manner. The latching contours 214, 215 are of the same shape here. But they can also have different shapes from one another.

The latching contours 214, 215 are each designed in the form of an elevation, so that the latching contours 214, 215 protrude from the respective side surface 211, 212. In the latching state, as shown in FIGS. 3 to 5, the latching contours 214, 215 dip through the latching areas 115, 116 of the base body 110 of the

Fastening device 100 through. The shape of the latching contours 214, 215 is adapted to the shape of the latching areas 115, 116, so that they have the same outer contour. The latching contours 214, 215 are each T-shaped here. The latching contours 214, 215 designed in the form of an elevation each have a run-up bevel 216, 217. The respective fastening arm 111, 112 of the base body 110 of the fastening device 100 can be pushed through the run-on bevel 216, 217 by simple handling over the elevation when fastening to the latching contour 214, 215, the run-on bevel 216, 217 deflecting the respective fastening arm 111, 112 can guide and control the

Fastening arm 111, 112 to slide onto the respective side surface 211, 212 of the receiving rib 210.

The side surfaces 211, 212 each have one at an upper end

Limiting stop 218, 219, which protrude beyond the side surfaces 211, 212 or protrude from the side surfaces 211, 212. When the fastening device 100 is pushed onto the receiving rib 210, the fastening arms 111, 112 can in their end position with their free ends 119, 120 against the

Counterstop limit stops 218, 219.

In contrast to the fastening device 100, which is formed from a conductive material, the receiving rib 210 is made from an insulating material such as

for example plastic.

In Fig. 3 to 6 various arrangements 400 are shown, each one

Have connection arrangement 200 which is fastened to a printed circuit board 300 by means of fastening devices 100.

In the embodiment shown in FIG. 3, the connection arrangement 200 has a plurality of connection devices 220 arranged next to one another, four connection devices 220 being arranged here in a row. To the right and left of the connecting devices 220 arranged in a row, one armature plate 230 is arranged in each case, so that the connecting devices 220 are arranged between two armature plates 230.

Each armature disk 230 has two receiving ribs 210. Depending on the position of armature disk 230 relative to printed circuit board 300, it is possible to select on which receiving rib 210 a fastening device 100 is arranged. Using the Fastening device 100, the armature disk 230 is soldered to the printed circuit board 300. Each of the two armature disks 230 shown in FIG. 3

Connection arrangement 200 has a fastening device 100 which is arranged on one of the receiving ribs 210 of the armature disks 230.

In the embodiment shown in FIG. 4, the receiving ribs 210 are also formed on armature disks 230, the armature disks 230 being arranged here between two connection devices 220.

In the embodiment shown in FIG. 5, the connection arrangement 200 does not have an armature disk 230. The connection arrangement 200 has a connection device 220, with several on the housing 221 of the connection device 220

Receiving ribs 210 are formed, so that here the fastening device 100 is fastened directly to the housing 221 of the connection device 220 in order to form a soldered connection to the circuit board 300.

FIG. 6 shows an arrangement 400 as shown in FIG. 3, the connection arrangement 200 being rotated by an angle of 90 ° to the circuit board 300 in the illustration in FIG a fastening device 100 is provided.

The receiving rib 210 is formed in one piece on the armature disk 230 or on the housing 221 of the connection device 220.

If two or more receiving ribs 210 are formed on an armature disk 230 or on a housing 221 of the connection device 220, then the individual

Receiving ribs 210 of an armature disk 230 or a housing 221 of a

Connection device 220 arranged at an angle, preferably rotated by 90 °, so that armature disk 230 or connection device 220 and thus connection arrangement 200 can be fastened vertically or horizontally to a circuit board 300. List of reference symbols

100 fastening device

110 base body

111 mounting arm

112 mounting arm

113 link arm

114 interior

115 Rest area

116 Rest area

117 inner surface

118 inner surface

119 Free end

120 Free end

121 guide slope

122 guide slope

123 transition area

124 transition area

125 plumbing space

126 plumbing space

127 inner surface

128 exterior surface

200 connection arrangement

210 receiving rib

211 side face

212 side face

213 bottom

214 locking contour

215 locking contour

216 bevel

217 ramp

218 Limit stop

219 limit stop

220 connection device Housing armature disk printed circuit board arrangement

Claims

Expectations

1. Fastening device (100) for fastening a connection arrangement (200) to a circuit board (300), with

a U-shaped base body (110) which has a first

Fastening arm (111, 112) which can be fastened to the connection arrangement (200), a second fastening arm (111, 112) which is arranged parallel to the first fastening arm (111, 112) and which is attached to the

Terminal arrangement (200) can be fastened, and a connection arm (113), which connects the first fastening arm (111, 112) to the second fastening arm (111, 112) and which can be fastened to the circuit board (300), wherein a first transition area (123, 124) between the connecting arm (113) and the first fastening arm (111, 112) and a second

Transition area (123, 124) between the connecting arm (113) and the second fastening arm (111, 112) are curved, so that a first solder receiving space (125, 126) at the first transition area (123, 124) and a second solder receiving space (125 , 126) at the second transition area (123,

124) are formed.

2. Fastening device (100) according to claim 1, characterized in that the first fastening arm (111, 112) and / or the second fastening arm (111, 112) has a latching area (115, 116) for fastening the base body (110) to the connection arrangement (200) have.

3. Fastening device (100) according to claim 2, characterized in that the latching area (115, 116) is designed in the form of a window-like recess.

4. Fastening device (100) according to claim 3, characterized in that the window-like recess is T-shaped.

5. Fastening device (100) according to one of claims 1 to 4, characterized

characterized in that at a free end (119, 120) of the first

Mounting arm (111, 112) and / or at a free end (119, 120) of the second fastening arm (111, 112) a guide slope (121, 122) is formed.

6. Fastening device (100) according to one of claims 1 to 5, characterized

characterized in that the base body (110) is formed from a tin-plated metal strip.

7. Fastening device (100) according to claim 6, characterized in that the metal strip is formed from a copper material.

8. Arrangement (400), with a circuit board (300), one on the circuit board (300)

attached connector assembly (200) and at least one

Fastening device (100) for fastening the connection arrangement (200) to the printed circuit board (300), the fastening device (100) being designed according to one of Claims 1 to 7.

9. Arrangement (400) according to claim 8, characterized in that the

Connection arrangement (200) has at least one receiving rib (210) to which the at least one fastening device (100) is attached.

10. The arrangement (400) according to claim 9, characterized in that the

at least one receiving rib (210) has at least one latching contour (214, 215), via which the at least one fastening device (100) is fastened in a latching manner on the at least one receiving rib (210).

11. The arrangement (400) according to claim 10, characterized in that the

at least one latching contour (214, 215) is designed in the form of an elevation which, in a latching state, through a latching area (115, 116) of the first fastening arm (111, 112) or the second fastening arm (111, 112) designed in the form of a window-like recess ) of the base body (110) of the fastening device (100) penetrates.

12. The arrangement (400) according to claim 11, characterized in that the

Elevation has a bevel (216, 217).

13. Arrangement (400) according to claim 11 or 12, characterized in that the elevation is T-shaped.

14. Arrangement (400) according to one of claims 9 to 13, characterized in that the at least one receiving rib (210) on a housing (221) of a connection device (220) of the connection arrangement (200) or on an armature disk (230) of the connection arrangement (200) is formed.